yfb-luoshujie

fix when after_scheduler=StepLR, and step_size=1

1

when after_scheduler=StepLR(step_size=1), there is a problem with the lr, at the first epoch of after_scheduler work. for example: ``` model = [torch.nn.Parameter(torch.randn(2, 2, requires_grad=True))] optim = SGD(model, 0.1) scheduler_steplr =...